/*
    Copyright 2005-2013 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks.

    Threading Building Blocks is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    Threading Building Blocks is distributed in the hope that it will be
    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Threading Building Blocks; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    As a special exception, you may use this file as part of a free software
    library without restriction.  Specifically, if other files instantiate
    templates or use macros or inline functions from this file, or you compile
    this file and link it with other files to produce an executable, this
    file does not by itself cause the resulting executable to be covered by
    the GNU General Public License.  This exception does not however
    invalidate any other reasons why the executable file might be covered by
    the GNU General Public License.
*/

#define VIDEO_WINMAIN_ARGS

#include <iostream>
#include "tbb/tick_count.h"
#include "../../common/utility/utility.h"

#if __TBB_MIC
#pragma offload_attribute (push,target(mic))
#endif // __TBB_MIC
#include "seismic_video.h"
#include "universe.h"
#include "tbb/task_scheduler_init.h"

Universe u;
#if __TBB_MIC
#pragma offload_attribute (pop)
#endif // __TBB_MIC

struct RunOptions {
    //! It is used for console mode for test with different number of threads and also has
    //! meaning for GUI: threads.first  - use separate event/updating loop thread (>0) or not (0).
    //!                  threads.second - initialization value for scheduler
    utility::thread_number_range threads;
    int numberOfFrames;
    bool silent;
    bool parallel;
    RunOptions(utility::thread_number_range threads_ ,    int number_of_frames_ ,     bool silent_ , bool parallel_ )
        : threads(threads_),numberOfFrames(number_of_frames_), silent(silent_), parallel(parallel_)
    {
    }
};

int do_get_default_num_threads() {
    int threads;
    #if __TBB_MIC
    #pragma offload target(mic) out(threads)
    #endif // __TBB_MIC
    threads = tbb::task_scheduler_init::default_num_threads();
    return threads;
}

int get_default_num_threads() {
    static int threads = do_get_default_num_threads();
    return threads;
}

RunOptions ParseCommandLine(int argc, char *argv[]){
    // zero number of threads means to run serial version
    utility::thread_number_range threads(get_default_num_threads,0,get_default_num_threads());

    int numberOfFrames = 1000;
    bool silent = false;
    bool serial = false;

    utility::parse_cli_arguments(argc,argv,
        utility::cli_argument_pack()
            //"-h" option for for displaying help is present implicitly
            .positional_arg(threads,"n-of-threads",utility::thread_number_range_desc)
            .positional_arg(numberOfFrames,"n-of-frames","number of frames the example processes internally")
            .arg(silent,"silent","no output except elapsed time")
            .arg(serial,"serial","in GUI mode start with serial version of algorithm")
    );
    return RunOptions(threads,numberOfFrames,silent,!serial);
}

int main(int argc, char *argv[])
{
    try{
        tbb::tick_count mainStartTime = tbb::tick_count::now();
        RunOptions options = ParseCommandLine(argc,argv);
        SeismicVideo video(u,options.numberOfFrames,options.threads.last,options.parallel);

        // video layer init
        if(video.init_window(u.UniverseWidth, u.UniverseHeight)) {
            video.calc_fps = true;
            video.threaded = options.threads.first > 0;
            // video is ok, init Universe
            u.InitializeUniverse(video);
            // main loop
            video.main_loop();
        }
        else if(video.init_console()) {
            // do console mode
            for(int p = options.threads.first;  p <= options.threads.last; p = options.threads.step(p)) {
                tbb::tick_count xwayParallelismStartTime = tbb::tick_count::now();
                u.InitializeUniverse(video);
                int numberOfFrames = options.numberOfFrames;
                #if __TBB_MIC
                drawing_memory dmem = video.get_drawing_memory();
                char *pMem = dmem.get_address();
                size_t memSize = dmem.get_size();

                #pragma offload target(mic) in(u, numberOfFrames, p, dmem), out(pMem:length(memSize))
                {
                    // It is necessary to update the pointer on mic 
                    // since the address spaces on host and on target are different
                    dmem.set_address(pMem);
                    u.SetDrawingMemory(dmem);
                #endif // __TBB_MIC
                if (p==0){
                    //run a serial version
                    for( int i=0; i<numberOfFrames; ++i ){
                        u.SerialUpdateUniverse();
                    }
                }else{
                    tbb::task_scheduler_init init(p);
                    for( int i=0; i<numberOfFrames; ++i ){
                        u.ParallelUpdateUniverse();
                    }
                }
                #if __TBB_MIC
                }
                #endif // __TBB_MIC

                if (!options.silent){
                    double fps =  options.numberOfFrames/((tbb::tick_count::now()-xwayParallelismStartTime).seconds());
                    std::cout<<fps<<" frame per sec with ";
                    if (p==0){
                        std::cout<<"serial code\n";
                    }else{
                        std::cout<<p<<" way parallelism\n";
                    }
                }
            }
        }
        video.terminate();
        utility::report_elapsed_time((tbb::tick_count::now() - mainStartTime).seconds());
        return 0;
    }catch(std::exception& e){
        std::cerr<<"error occurred. error text is :\"" <<e.what()<<"\"\n";
        return 1;
    }
}
